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<head>
    <title></title>
    <script type="text/javascript">
        //        function mm() {
        //            //alert(arguments[0] + arguments[1]);
        //            //alert(arguments.callee());
        ////            if (arguments[2] === undefined) {
        ////                arguments.callee(1, 2, 3);
        ////            }
        ////            else {
        ////                document.write(arguments[2]);
        ////            }

        //            function uuu() {
        //                document.write(arguments.callee.caller);
        //            }
        //            uuu();
        //        }
        //        mm(2,888);

        function mm2() {
            var mmc = 1;
            this.ccc = "1";
            this.qq = function () {
                return this.constructor;
            }
        }

        function mm5() {

        }
        mm5.prototype = new mm2();
        mm2.prototype.sss = "222";
        var mm3 = new mm2();
        var mm6 = new mm5();
        document.write(mm5.prototype.constructor == mm2);
    </script>
</head>
<body>
</body>
</html>
